TeliaSonera owned Cygate closes transaction and acquires Dimension Data Sweden

Press Release
June 11, 2007

TeliaSonera owned Cygate closes transaction and acquires Dimension Data Sweden

TeliaSonera owned Cygate has closed the acquisition of the shares in Dimension
Data Sweden, a subsidiary of the global systems integrator Dimension Data
Holdings plc. The acquisition has now been approved by the Swedish Competition
Authority.

Following the approval from the Swedish Competition Authority Cygate acquires a
company with 74 employees located in two offices in Stockholm and Malmö. The
revenue for Dimension Data Sweden was SEK 182 million in 2006. The integration
of Dimension data Sweden will be finalised on October 1, 2007.

During the last years, Cygate has acquired several companies, amongst them
Måldata and Bravida Communications. Since January 2007, Cygate is owned by
TeliaSonera, the Nordic and Baltic telecommunications leader.

About Cygate
Cygate is a Nordic company headquartered in Stockholm. With 250 employees in its
Finland and Sweden offices, it is a leading Nordic supplier of services,
products and solutions for secure IT infrastructure. The company has
partnerships with leading vendors and a 20-year history of designing, installing
and maintaining IP network solutions using a combination of their own solutions
and products from partners.

About Dimension Data
Dimension Data plc (LSE:DDT), a specialist IT services and solution provider,
helps clients plan, build, support and manage their IT infrastructures.
Dimension Data applies its expertise in networking, security, operating
environments, storage and contact center technologies and its unique skills in
consulting, integration and managed services to create customized client
solutions.

For further information journalists can contact:
TeliaSonera Press service, +46-(0)8-713 58 30

Forward-Looking Statements
Statements made in the press release relating to future status or circumstances,
including future performance and other trend projections are forward-looking
statements. By their nature, forward-looking statements involve risk and
uncertainty because they relate to events and depend on circumstances that will
occur in the future. There can be no assurance that actual results will not
differ materially from those expressed or implied by these forward-looking
statements due to many factors, many of which are outside the control of
TeliaSonera.

TeliaSonera is the leading telecommunications company in the Nordic and Baltic
region, with strong positions within mobile communications in Eurasia, Turkey
and Russia. At the end of 2006, TeliaSonera launched mobile services in Spain.
We provide reliable, innovative and easy-to-use services for transferring and
packaging voice, images, data, information, transactions and entertainment. In
2006, TeliaSonera's net sales amounted to SEK 91 billion, and at the end of
March 2007 the total number of customers exceeded 100 million in 15 countries.
The TeliaSonera share is listed on the Stockholm Stock Exchange and the Helsinki
Stock Exchange, and the company is included in the Dow Jones Sustainability
Index. Simplicity and service are important tools for us in creating profitable
growth and value for our customers and shareholders. Read more at
www.teliasonera.com.